RE: [RFC PATCH 0/5] hw/arm/virt: Add support for user-creatable nested SMMUv3

[Duan, Zhenzhong]

Hi Shameer,

>-----Original Message-----
>From: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>
>Subject: RE: [RFC PATCH 0/5] hw/arm/virt: Add support for user-creatable nested
>SMMUv3
>
>
>
>> -----Original Message-----
>> From: Nicolin Chen <nicolinc@nvidia.com>
>> Sent: Thursday, January 23, 2025 4:10 AM
>> To: Donald Dutile <ddutile@redhat.com>
>> Cc: Shameerali Kolothum Thodi
>> <shameerali.kolothum.thodi@huawei.com>; eric.auger@redhat.com; Peter
>> Maydell <peter.maydell@linaro.org>; Jason Gunthorpe <jgg@nvidia.com>;
>> Daniel P. Berrangé <berrange@redhat.com>; qemu-arm@nongnu.org;
>> qemu-devel@nongnu.org; Linuxarm <linuxarm@huawei.com>; Wangzhou
>> (B) <wangzhou1@hisilicon.com>; jiangkunkun <jiangkunkun@huawei.com>;
>> Jonathan Cameron <jonathan.cameron@huawei.com>;
>> zhangfei.gao@linaro.org
>> Subject: Re: [RFC PATCH 0/5] hw/arm/virt: Add support for user-creatable
>> nested SMMUv3
>>
>> Hi Don,
>>
>> On Fri, Jan 10, 2025 at 11:05:24PM -0500, Donald Dutile wrote:
>> > On 1/8/25 11:45 PM, Nicolin Chen wrote:
>> > > On Mon, Dec 16, 2024 at 10:01:29AM +0000, Shameerali Kolothum Thodi
>> wrote:
>> > > > And patches prior to this commit adds that support:
>> > > > 4ccdbe3: ("cover-letter: Add HW accelerated nesting support for arm
>> > > > SMMUv3")
>> > > >
>> > > > Nicolin is soon going to send out those for review. Or I can include
>> > > > those in this series so that it gives a complete picture. Nicolin?
>> > >
>> > > Just found that I forgot to reply this one...sorry
>> > >
>> > > I asked Don/Eric to take over that vSMMU series:
>> > > https://lore.kernel.org/qemu-devel/Zy0jiPItu8A3wNTL@Asurada-Nvidia/
>> > > (The majority of my effort has been still on the kernel side:
>> > >   previously vIOMMU/vDEVICE, and now vEVENTQ/MSI/vCMDQ..)
>> > >
>> > > Don/Eric, is there any update from your side?
>> > >
>> > Apologies for delayed response, been at customer site, and haven't been
>> keeping up w/biz email.
>> > Eric is probably waiting for me to get back and chat as well.
>> > Will look to reply early next week.
>>
>> I wonder if we can make some progress in Feb? If so, we can start
>> to wrap up the iommufd uAPI patches for HWPT, which was a part of
>> intel's series but never got sent since their emulated series is
>> seemingly still pending?
>
>I think these are the  5 patches that we require from Intel pass-through 
>series,
>
>vfio/iommufd: Implement [at|de]tach_hwpt handlers
>vfio/iommufd: Implement HostIOMMUDeviceClass::realize_late() handler
>HostIOMMUDevice: Introduce realize_late callback
>vfio/iommufd: Add properties and handlers to
>TYPE_HOST_IOMMU_DEVICE_IOMMUFD
>backends/iommufd: Add helpers for invalidating user-managed HWPT
>
>See the commits from here,
>https://github.com/hisilicon/qemu/commit/bbdc65af38fa5723f1bd9b026e29273
>0901f57b5
>
>[CC  Zhenzhong]
>
>Hi Zhenzhong,
>
>Just wondering what your plans are for the above patches.  If it make sense and
>you
>are fine with it, I think it is a good idea one of us can pick up those from 
>that
>series
>and sent out separately so that it can get some review and take it forward.

Emulated series is merged, I plan to send Intel pass-through series after
Chinese festival vacation, but at least half a month later. So feel free to
pick those patches you need and send for comments.

Thanks
Zhenzhong